From 895f89c97358ef22bd962ea8baa5d8caa102e642 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Wed, 25 Mar 2026 04:05:59 +0000
Subject: [PATCH] =?UTF-8?q?=E2=9A=A1=20Bolt:=20Add=20`.lazy`=20to=20array?=
 =?UTF-8?q?=20chains=20in=20CacheoutViewModel?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Co-authored-by: acebytes <2820910+acebytes@users.noreply.github.com>
---
 .jules/bolt.md                                      | 3 +++
 Sources/Cacheout/ViewModels/CacheoutViewModel.swift | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)
 create mode 100644 .jules/bolt.md

diff --git a/.jules/bolt.md b/.jules/bolt.md
new file mode 100644
index 0000000..8de2fc0
--- /dev/null
+++ b/.jules/bolt.md
@@ -0,0 +1,3 @@
+## 2024-05-24 - `Array.lazy` Collection Chain Optimization
+**Learning:** Chaining array operations like `.filter {}.reduce()` allocates intermediate arrays that can negatively impact performance. The memory and computation cost is high, particularly in views or view models where properties might be accessed repeatedly.
+**Action:** Append `.lazy` before chained collection functions like `.filter` and `.map` when reducing an array to a single value to avoid memory allocations and unnecessary array traversals.
diff --git a/Sources/Cacheout/ViewModels/CacheoutViewModel.swift b/Sources/Cacheout/ViewModels/CacheoutViewModel.swift
index 13a9811..8bd694d 100644
--- a/Sources/Cacheout/ViewModels/CacheoutViewModel.swift
+++ b/Sources/Cacheout/ViewModels/CacheoutViewModel.swift
@@ -114,7 +114,7 @@ class CacheoutViewModel: ObservableObject {
     }
 
     var totalRecoverable: Int64 {
-        scanResults.filter { !$0.isEmpty }.reduce(0) { $0 + $1.sizeBytes }
+        scanResults.lazy.filter { !$0.isEmpty }.reduce(0) { $0 + $1.sizeBytes }
     }
 
     var hasResults: Bool { !scanResults.isEmpty || !nodeModulesItems.isEmpty }
@@ -131,7 +131,7 @@ class CacheoutViewModel: ObservableObject {
     }
 
     var selectedNodeModulesSize: Int64 {
-        nodeModulesItems.filter(\.isSelected).reduce(0) { $0 + $1.sizeBytes }
+        nodeModulesItems.lazy.filter(\.isSelected).reduce(0) { $0 + $1.sizeBytes }
     }
 
     var formattedSelectedNodeModulesSize: String {